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=4x²-2x²+6xy+4xy+4y²-3y²
=6x²+2xy-7y² (D)
24) (2x-3)×(x+5)
=2x²+10x-3x-15
=2x²+13x-15 (D)
25) 3ab 9b²
___ : ___
2c 4ac
3ab 4ac
= ___ × ___
2c 9b²
2a²
= __ (A)
3b
Maaf 26 sy kurang tau